fix mysqltest cases

src/sql/engine/px/ob_px_coord_msg_proc.cpp

@@ -124,7 +124,7 @@ int ObPxSubCoordMsgProc::on_whole_msg(
     const ObRDWFWholeMsg &pkt) const
 {
   ObDhWholeeMsgProc<ObRDWFWholeMsg> proc;
-  return proc.on_whole_msg(sqc_ctx_, dtl::DH_RANGE_DIST_WF_WHOLE_MSG, pkt);
+  return proc.on_whole_msg(sqc_ctx_, dtl::DH_RANGE_DIST_WF_PIECE_MSG, pkt);
 }
 
 int ObPxSubCoordMsgProc::on_whole_msg(
@@ -146,4 +146,4 @@ int ObPxSubCoordMsgProc::on_whole_msg(
 {
   ObDhWholeeMsgProc<ObOptStatsGatherWholeMsg> proc;
   return proc.on_whole_msg(sqc_ctx_, dtl::DH_OPT_STATS_GATHER_WHOLE_MSG, pkt);
-}
\ No newline at end of file
+}